add initial migration

Signed-off-by: simonsan <[email protected]>

migrations/2024-03-24-201233_create_activities/down.sql

@@ -0,0 +1,2 @@
+-- This file should undo anything in `up.sql`
+DROP TABLE activities;

migrations/2024-03-24-201233_create_activities/up.sql

@@ -0,0 +1,14 @@
+-- Migration script for creating the activities table in SQLite
+
+CREATE TABLE activities (
+    id TEXT PRIMARY KEY,
+    category TEXT NOT NULL,
+    description TEXT NOT NULL,
+    begin TEXT NOT NULL,
+    end TEXT NOT NULL,
+    duration INTEGER NOT NULL,
+    kind TEXT NOT NULL,
+    status TEXT NOT NULL,
+    parent_id INTEGER,
+    FOREIGN KEY (parent_id) REFERENCES activities(id)
+);